
Overview
The ISP281B is a transistor, Photovoltaic Output Optoisolator made by Isocom Components in a SOIC-4-175mil package with 4 pins.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:MPS2733-1, from EasyEDA) and its footprint (EasyEDA_Cloud:SOP-4_L4.4-W2.6-P1.27-LS7.0-BL, from EasyEDA), ready for a KiCad board. JLCPCB lists it (part C6176936).
Symbol
Footprint
Parameters
14- Current Transfer Ratio (CTR) Maximum/Saturation Value
- 260%
- Current Transfer Ratio (CTR) Minimum
- 130%
- Fall time
- 3us
- Forward Current(If)
- 50mA
- Isolation Voltage(Vrms)
- 3.75kV
- Load Voltage
- 80V
- Number of Outputs
- 1
- Operating Temperature
- -55℃~+110℃
- Output Current
- 50mA
- Output Type
- Phototransistor
- Reverse Voltage
- 6V
- Rise time
- 2us
- Total Power Dissipation(Pd)
- 200mW
- Voltage - Forward(Vf)
- 1.4V
Order codes
1- ISP281BLCSC C6176936
Pinout
4| Pin | Name | Type |
|---|---|---|
| 1 | A | Unspecified |
| 2 | C | Unspecified |
| 3 | E | Unspecified |
| 4 | C | Unspecified |
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<iframe src="https://pcbkit.io/embed/parts/isocom-components/ISP281B" title="ISP281B in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/isocom-components/ISP281B.jpg" alt="ISP281B" width="1200" height="900">[](https://pcbkit.io/parts/isocom-components/ISP281B)Questions
Is there a KiCad symbol and footprint for the ISP281B?
Yes. The symbol is EasyEDA_Cloud:MPS2733-1 and the footprint EasyEDA_Cloud:SOP-4_L4.4-W2.6-P1.27-LS7.0-BL, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the ISP281B?
SOIC-4-175mil, with 4 pins. Its footprint is drawn on this page.
Where is the ISP281B datasheet?
Isocom Components publishes it: the Datasheet link on this page opens it.
Where can I order the ISP281B?
JLCPCB lists it as part C6176936, with 0 in stock; the sellers' links on this page open their listings.
What can replace the ISP281B?
Parts like it in the library: the ACPL-217-50DE by Broadcom Limited, the CYTLP291(GB-TP) by OCIC, the OR-3H4A-TP-G by Orient and the OR-3H5-TP-G by Orient. Check their datasheets: a part that fits the footprint may still differ in its ratings.
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